At the 6 p.m. vigil in Balboa Park Thursday night, activists and supporters will march to the Hall of Justice in order to convince the U.S. Department of Justice to conduct an investigation of Rojas' death. Participants will also bring awareness to other instances of alleged Border Patrol abuses on undocumented immigrants.

A video of the confrontation in May of 2010 appears to show part of a confrontation that led to his heart attack hours later. Humberto Navarrete captured the grainy and dark video on his cellphone. In it Navarrete said yelled for help as U.S. Border Patrol agents attempt to subdue him.

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Hernandez was being removed from the country at the San Ysidro Port of Entry when he resisted and was eventually shot with a Taser stun gun, according to U.S. Customs and Border Protection.

“I witnessed everything that happened from the beginning to the end,” said Navarrete.

“I was on my way to Tijuana. One of the uniformed agents had a knee on his back, another agent had his other knee on the back of his neck,” he said.

In the video Navarrete asks a U.S. agent nearby why they’re using “excessive force.” The agent replies that it appears he’s not cooperating.